Fountain-pen.



C. W. BOMAN.

FOUNTAIN PEN.

APPLICAHON FILED SEPT. 3o. |915.

Patented Nov. 21, H916.

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CLAES w. ROMAN, or' BItOOKL'YN, NEW YORK, essIGNon To EAGLE PENCILCOMPANY,

FOUNTAINEN.

Specication of'Lette-rs Patent.

Patented Nov. 2l, i916.

Application led September 30, Serial No. 123,121.

, To all whom t may conce-m which the followingis a specification.

My invention relates to self-filling fountain pens oit that type inwhich an inwardly mow able presser bar, extending lengthwise of acollapsible ink bag and interposed between it and the tubular pen handlein which the ink bag ijs honsed,` can be reached andk operatedthrough'an opening in the side of( the handle.

My invention consists of a novel `construction and arrangement of theoperating means for actuating the presser bar to corn press theCollapsible ink has, designed 't0 produce a deyice simple and effectivein action', and lwhich can'be conveniently 'and securely applied; to,and fitted and heid in assured position on, the pen'handle. Theimprovement will first be 'described in connection withv the drawingforming part Ot' this specilication, and will then be more particularlypointed out in the claim.

Infthe drawings-Figure 1 is a plan View of a fountain pen embodying myimprovement'in its preferred form. Fig. 2 is a longitudinal axialsection .on yenlergefl scale of thes'ame partly in elevation inthe planeof the operating stem S showing the parts in the position they assumewith that stem in folded down position. Fig. 3 is a similar sectionpartly in elevation with the stem turned up at right angles to the penhandle and its inner end resting `upon the presser bar D, in theposition it occupies when the ink bag is uncompressed. Fig. 4 is asimilar sectional. elevation to the preceding igure with the operatingstem in the position it assumes when it has been pushed inward from theposition shown in Fig. 3 to Compress the ink bag.

In Figs. 8 and the end portions of the pen are shown in elevation andonly the intermediate portion of it in which my improvement is embracedis shown in section.

A is the tubular pen handle kwith the usual nozzle B, which holds thefeed bar and pen, fitted into its front end. Within the handle is thecollapsible, resilient, vulcanized softrubber ink bag C having its mouthfitted upon the rear end of the nozzle B; and interposed between the inkbag and the handle the presser bar D extending as customary lengthwiseoffthe ink bag inpositiontobe pressed inwardly by a dei/ice Operatingthrough a suitable opening in thehandle. The presser bar may be held inits position relativelyto the inl! bag in any known way and by anysuitable or '1)iefe1red-1iieans. In the present instance it is made ofspring metal and has its rear portion bent into Ur-shape', as indicatedat B', this U portion serving to hold the presser bar into 'place andalso acting as a spring to return the presser'bar to its normal outerposition roin the inward position to which it is forced in order tocompress the ink bag. The resiliency ofthe ink bag aids in this returnmoyementfof the presser bar. Thus far there yis nohing new in the pen.

the presser bar in which my present inventionis comprised, these meansconsisting ot an operating stem S longitudinally slotted as :it S, ann apin fg) secured inor tothe handle in a position to extend crosswise otthe longitudinal slot o therein, in .rhich the operating stem snuglyfits and lies iiush with the handle when in its turned-downinoperative'position as in Fig. Q. The pin is located at or near one endof the slot a, in this instance the rear end, In this position it passesthrough the slot s in the operating stemwhose free end is at .heopposite end of the slot a, as shown, the stem being capableeither ofturning on the pin as a pivot or of sliding bodily upon it as a guideaccording to its position. lt turns upon the pin as a pivot in movingfrom its foldeddown position in Fig. 2 to its turned-up position in Fig.3. After having been brought to the upright position shown in the lastmentioned figure with its slotted front or inner end resting on thepresser bar and the pin 7) at the inner end of a slot s, the stem isthen pushed bodily inward to Cause the presser bar to compress the inkbag as shown in Fig. 4, the pin p during this movement serving simply asa guide for the slotted stem. When pressure is removed from the stem,the latter, by the resilient action of both the presser bar and the inkbag, is pushed bodily outward to the position in Fig. 3 from which itstarted, where it may again be folded down iiat into the slot a in thehandle upon the pin p as i. come now to the means for operating a pivot,thus returning to the position shown in Fig. 2.

The front or inner end s of the operating stem is perferably flat andsquare so that it will take a square fiat bearing on the presser barwhen the stem is in upright position. The heel 82 of this end will, inconjunction with the outwardly spring-pressed presser bar D againstwhich it rests, form a spring detent to hold the operating stem fromaccidental displacement in eitherv its open or shut position somewhatafter the fashion in which'the blade of a jack knife is held. The inwarddepression of the presser bar which takes place as the heel s2 moves itwhen the operating stem is turning from open to shut position or viceversa is very slight and not suflicient to cause the appreciableejection of any of the contents of the ink bag.

The compression for fitting purposes is effected only after theoperating stem has been brought to upright position at right angles tothe Den handle as shown in Fig. The inward movement of the operatingstem from this position to that shown in Fig. al for thus compressingthe ink bag' is effected, as before said, by hand pressure, the stemunder this'pressure moving bodily in a right line in the direction ofits length and being assured in its upright position while thus movingby the guiding contact of the pin Z) with the walls of its solt s aswell as by the bea 1ing which its squared inner end s takes against thepresser bar.

The free or handle end of the oprating stem may be formed in anysuitable way to furnish a hold by which it can be lifted from shut toopen position. In this instance this end of it is beveled as shown at I)and at the `v`point of the bevel there is a recess r in the n best vwayknown to me of carrying the same into practical effect, state inconclusion that I do not limit myself narrowly to the structural detailshereinbefore shown and set forth in illustration of my invention, sincemanifestly the same can be varied in a number of particulars withoutdeparture from the spirit. of the invention; but

lvVhat I claim and desire to secure by Let ters Patent is as follows:

In a self-filling fountain pen, the combination with a A tubular handle,nozzle, collapsible ink bag, and presser bar interposed between the inkbag and theJ handle and eX- tending lengthwise of the said bag in linewith an opening in the side of the handle through which it may bereached; of an operating stem fitting said opening, and longitudinallyslotted at one end for a portion of its length; and a pin mounted in thehandle to extend crosswise of the side opening therein and through theslot in the operating stem, said pin when the stem is in shut positionbeing at or near that end of the slot farthest removed from the handleend of the stem, whereby the stem in moving from shut to open positionor vice versa will swing on said pin as a pivot and, after reaching itsupright position, when pushed inward to force the presser bar tocompress the ink bag will move bodily in that direction upon the pinV asa guide.

In testimony whereof I affix my signature CLAES W. BOMAN.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents. Washington, D. C.

